Chair seat



Jan. 4, 1927.

C. A. vEFPS CHAIR SEAT v Filed April 22. 1925 Arroz/veg Patente-d Jan. 4s, 1927.

ltlhlt'tEf@ STATES CLAUDE A. Erre, or rnonnrx, ARIZONA.

CHAIB SEAT.

Application area Apr-n 22, 1925. semina. 25,059.

This invention relates to an improved chair seat, and it has more specific reference to the construction of the frame.

As stated, the feature of the invention is the particular construction of the trame and broadly, this trame embodies, iront, rear and a pair of opposed side rails which have their adjacent ends spaced apart and disposed in an association to accommodate the upper ends ot the usual supporting legs located at the corners of the iframe.

The object is to do away with the common mortise and tenon joints between the rails and the legs, to obviate the necessity of gluing these parts together, and to substitute novel and adjustable means for detachably clamping the legs against the opposite ends of all oi? the rails.

More specifically, the object is to provide a pluralityV of relative long clamping bolts, wherein the headed end portions are eX- tended through the legs at right angles to each other and have their threaded shanks connected with theI adjacent end portions oi the rails, the arrangement being such that the nuts on the inner threaded ends of the bolts may be tightened for effecting an exceedingly irm and sturdy joint.

It is also a feature of the invention to locate blocks in the corners of the iframe thns formed, and to 'fasten these blocks Ato the rails to provide additional braces t'or the structure.

Other objects, features and advantages derived Jfrom the particular construction employ/ed for carrying the inventive conception into effect will become apparent from the following description and drawing.

ln the accompanying drawing forming a part of this application and in which like numerals are employed to designate like parts throughout the same:

Figure 1 is a bottom plan view of a chair seat constructed in accordance with the present invention showing portions of the frame in section and elevation.

Figure 2 is a detail view of a central portion of one of the side rails showing one embodiment oi" the construction.

Figure 3 is a fragmentary bottom plan showing a slightly different arrangement o'l the bolts.

In the drawing, the reference characters 1 and 2 designate the front and rear rails respectively or' the frame, while the reference characters 3 and 4 refer to the opposed side rails. The front pair of legs designated by the characters 5 while therear pair is indicated by the reference character 6. As is usual the upper ends of theV -front legs will terminate on a plane substantially even with the upper edges of the rails. rlhe rear legs however will extend up to form the back of the chair in the customary manner. The rails and legs are arranged as shown to provide a frame which simulates that employed in conventional chair bottoms or seats. The cushion of the seat will have a bottom board 7 fastened in place in an)T appropriate manner. The cushion and method of attachment may vary in construction, the gist of the invention residing more particularly in the particular construction of the vframe.

Under' the arrangement shown, the oppo- Siteends of each rail simply abut or bear against the adjacent tace oi the leg, there being no tongue and groove joint as is quite customary. Instead, a pair of bolts 8 and 9 are associated with each corner. The arrangement o the bolts at each corner of the frame being identical, the description will appear in the singular. To this end, and as before stated, the headed ends 10 of the bolts extend through the leg 6 at right angles to each other but on different planes. As shown in Figures 1 and 2, the inner faces of the adjacenty pair of coacting rails are formed with longitudinal grooves 11 which open through the outer ends of the rail, but open at their inner ends into a recess 12 formed at the center oi the rail. In this connection it shall be considered that the ends of the recess constitute shoulders or abutments. The shanks oir' the bolts are located in these grooves, and the threaded ends of the bolts extend into the recess 12. On each threaded end is a washer 13 and bearing against the washer is a nut 111. The washer is ofa diameter to span the adjacent end of the coacting groove 11, and it is clamped against the adjacent abutment by the nut 14. Obviously, by tightening the nut on the right angularly disposed pair of bolts 8 and 9, the rails will be clamped tightly against the intervening leg. Or it maybe said that the leg will be clamped tightly against the ends oi' the adjacent pair of rails. As before indicated, a corner block is employed at each corner of the frame. The block is disposed diagonally across the corner and is formed at least at one end with a tongue 16 extending into an adjacent groove 11. Attention may be called to the fact that the front pair of corner blocks are provided at both ends with these tongues 16. The rear corner blocks however are provided only at their rear ends with tongues. The forward ends are grooved. Also, inasmuch as it is necessary to dispose the right angularly arranged pair of bolts on different planes, it is also necessary to arrange the grooves in the adjacent rails on different planes, and the tongues 16 are correspondingly located. The corner blocks may be partially fastened in place by screws 17 fastened to the bottom board of the cushion and they may be nailed at their opposite ends to the rails. These blocks in addition to bracing the structure considerably serve to hold theV shanks of the bolts in their respective grooves and against accidental displacement.

Directing attention now to Figure 3 it will be seen that the reference characters 18 and 19 designate a pair of adjacent right angular rails with a leg 20 located between them.

As in the first form of the invention, these rails are provided on the inner sides withv grooves, but the grooves do not extend en tirely to the center, but are disposed on somewhat diagonal lines as indicated. In this form, a pair of bolts 22 have their headed ends connected with the post 20, have their intermediate portions extending through the grooves 21 and their threaded ends spaced from the inner faces of the rails 18 and 19. On each rail is a bracket 23 fastened by a screw 24 to the center of the rail. The bracket has laterally directed diverging ears 25 and the threaded nut carrying ends of the bolt extend through and cooperate with these ears. VThe clamping action obtained with this particular arrangement is probably more intense in view of the acute angular disposition of the bolts.

It is obvious that byconstructing a seat frame in accordance with this invention, loose movement between the rails and legs may be taken up from time to time so that no wobbling of the chair will be allowed. The truth of the matter is, a chair seat of this specific construction is so sturdy that it will stand undue rough usage without becoming weak. It is thought that by carefully considering the description in connection with the drawings, persons familiar with structures of this class will be able to obtain a clear understanding of the same. A more lengthy description will therefore not be entered.

lNhile the preferred embodiments of the invention have been shown and described, it is to be understood that minor changes coming within the field of invention claimed may be resorted to if desired.

Having thus described the invention, what I claim as new and desire to secure by Letters Patent is In a chair seat, of the kind described, a leg having an upper en'd portion of polygonal cross section, a pair of side rails having corresponding ends bearing against adjacent complemental faces of said polygonal portion and disposed at right angles to each other, the inner faces of said rails being formed with centrally disposed recesses and with longitudinal grooves extending from said recesses through the opposite end portions, said legs being provided with intersecting bolt holes disposed on superposed planes and alined with the adjacent ends of certain of said grooves, and clamping bolts having heads at their outer ends and screw threaded at their inner ends, said bolts extending through said bolt holes and then through said grooves so that the threaded ends terminate in said recesses, and clamping nuts carried by the inner threaded ends and bearing against end wall of said recesses, and a diagonal brace block arranged betweenthe grooved faces of said rails and having at its opposite ends extending into the grooves and bearing against the intermediate portion of said bolts.

In testimony whereof I affix my signature.

CLAUDE A.. nrrs.

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